摘要
采用多元合金化思路设计了一种新型低合金高强度高韧性锰钢.研究了该钢的静态CCT曲线、显微组织、断口形貌以及热处理工艺对钢的力学性能的影响.结果表明:该钢中过冷奥氏体的稳定性高,具有高淬透性及高回火稳定性,经890～930℃淬火及200～230℃回火后获得回火板条马氏体组织,使该钢具有高的强韧性(抗拉强度Rm≥1500MPa,冲击韧性Akv≥85J)匹配;钢中适当提高锰含量,符合我国资源情况,具有较高的性价比.
A new type of high-strength and high-toughness low-alloy Mn steel was designed by multi-element alloying.The static CCT diagram,microstructure,fracture morphology of the steel,as well as the effect of heat treatment on its mechanical properties,were studied.The results show that the stability of under-cooled austenite in the steel is excellent,which makes the steel have high hardenability and tempering stability.After being quenched at 890 to 930 ℃ and tempered at 200 to 230 ℃,the steel obtains tempered lath martensite which makes the steel the optimum combination of tensile strength R m and impact toughness A k v （ R m≥1 500 MPa,A k v ≥85 J）.A good performance-price ratio was determined by properly increasing the content of Mn which is abundant in China.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2010年第2期196-200,206,共6页
Journal of University of Science and Technology Beijing
关键词
高强度低合金钢
锰钢
力学性能
热处理
high-strength low-alloy steel
Mn steel
mechanical properties
heat treatment
